Greg typically moves trucks north, but may be of assistance going south. It's not a big deal, just have all the paperwork ready before you approach the border crossing, including scheduling your crossing. Show up without the appointment, be prepared to wait, and wait, then wait some more. You'll be getting the paperwork to apply for a title, as we don't use titles for vehicles, as the US does. I used to have a list of all the needed documents, and procedures, but I think CBP website lists it.
ETA: corrected CBP